package com.kylin.pc;

//测试生产者消费者问题2 ，信号灯法。标志位
public class TestPC2 {

    public static void main(String[] args) {
        TV tv = new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}


//生产者--->演员
class Player extends Thread {
    TV tv;

    public Player(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i % 2 == 0) {
                this.tv.play("快乐大本营播放中");
            } else {
                this.tv.play("抖音记录美好生活");
            }
        }
    }
}

//消费者-->观众
class Watcher extends Thread{
    TV tv;
    public Watcher(TV tv){
        this.tv=tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            tv.watch();
        }
    }
}

//产品-->节目
class TV {
    //演员表演，观众等待 T
    //观众观看，演员等待 F

    String voice;//表演界面
    boolean flag = true;//标志位

    //演员表演
    public synchronized void play(String voice) {
        if (!flag) {//flag为false
            //等待观众观看
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        System.out.println("演员表演了：" + voice);
        //通知观众观看
        this.notifyAll();//通知唤醒
        this.voice = voice;
        this.flag = !this.flag;
    }

    //观众表演
    public synchronized void watch() {
        if (flag) {//flag为true
            //等待演员表演
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        System.out.println("观看了" + voice);
        //通知演员观看
        this.notifyAll();//通知唤醒
        this.flag = !this.flag;
    }

}